If a force of $250\, N$ act on body, the momentum acquired is $125\, kg-m/s$. What is the period for which force acts on the body ......... $\sec$
$0.5$
$0.2 $
$0.4$
$0.25$
The momentum $p$ of an object varies with time $(t)$ as shown in figure. The corresponding force $(F)$-time $(t)$ graph is
Figures $(a), (b), (c)$ and $(d)$ show variation of force with time.
The impulse is highest in figure.
A block of mass $5 kg$ moves along the $x$-direction subject to the force $F=(-20 x+10) N$, with the value of $x$ in metre. At time $t=0 s$, it is at rest at position $x=1 m$. The position and momentum of the block at $t=(\pi / 4) s$ are
Write and explain Newton’s third law of motion. Write important points of Newton’s third law of motion.
“Momentum and changes in momentum are not always in same direction”. Explain by suitable example.